Here are the notes with a citation attached to each individual point, as requested.
The Evolution of Nursing: A Century-by-Century Overview
Ancient Times (c. 2000 BC – 3rd century AD)
Caregiving in this era was informal and mostly carried out within families, by religious figures, or by slaves and servants. There was no formal training, no organized profession, and care was tied closely to religious and superstitious beliefs about illness rather than clinical knowledge.
3rd–4th Century AD: Roman Empire
Nursing as an organized activity is generally traced to the height of the Roman Empire, around 300 AD. The Empire built hospitals in towns under its rule, and nurses were needed to assist physicians in caring for patients in these new institutions. This is considered the earliest point at which nursing took on a distinct occupational role rather than purely informal family care.
- Frontier Nursing University, "The History of Nursing," https://frontier.edu/news/history-of-nursing
Middle Ages (5th–14th Century)
Nursing became deeply intertwined with religion. Most nurses were nuns or monks operating out of monasteries, and hospitals of this era did more than treat the sick and injured, they also housed refugees and people with leprosy. Nurses of this period carried out a much broader range of duties than nurses today, combining clinical care with charitable and custodial functions.
- Frontier Nursing University, "The History of Nursing," https://frontier.edu/news/history-of-nursing
Renaissance (14th–17th Century)
The Renaissance brought a renewed focus on science, anatomy, and observation that gradually transformed medicine. However, nursing itself did not benefit much from this progress. Caregiving remained low-status work, typically performed by poor women, prisoners, or untrained volunteers, which is why historians often call this period the "Dark Age of Nursing" despite the surrounding scientific advances.
17th–18th Century: Stagnancy
At the dawn of the 17th century, nursing actually regressed in several countries. Religious reforms forced many nuns who had worked as nurses to leave the profession and return home, and numerous monasteries and their attached hospitals shut down. As a result, nursing remained largely stagnant through the 17th and 18th centuries, with little formal training or organizational progress.
- Frontier Nursing University, "The History of Nursing," https://frontier.edu/news/history-of-nursing
19th Century: The Birth of Modern Nursing
This century marks the true turning point. Florence Nightingale is credited as the founder of modern, professional nursing. During the Crimean War (1854), she organized care for wounded British soldiers and used mortality data to demonstrate that improved hygiene and sanitation dramatically reduced deaths, effectively founding both modern nursing practice and the use of statistics in healthcare quality improvement.
- Mulholland and Greenfield's Surgery: Scientific Principles and Practice, 7e, Introduction, p. 1
Alongside John Snow, Nightingale is also regarded as a pioneer of using data to drive patient care improvements more broadly, and this period saw the first schools of nursing built on her principles, along with Clara Barton founding the American Red Cross in the 1880s.
20th Century: Professionalization and Licensing
In 1903, North Carolina passed the first nurse registration law, followed quickly by New Jersey, New York, and Virginia; licensing spread nationwide over subsequent decades, and by the 1970s every state required licensure for registered and practical nurses. Thousands of nurses also served in military hospitals during WWI and WWII, including Black nurses such as Adah Belle Thoms who advocated for inclusion in the U.S. Army Nurse Corps, and in 1947 the National League for Nursing Education pushed to integrate nursing into higher education, leading to bachelor's degree programs.
The early twentieth century also saw the founding of the American Nurses Association (ANA) in 1911, and the mid-to-late century brought the development of specialized nursing fields, advanced practice roles, growing workforce diversity, and an increasing emphasis on evidence-based practice.
21st Century: Technology and Expanded Scope
The 2009 HITECH Act spurred widespread adoption of electronic health records (EHRs), transforming patient documentation and interdisciplinary communication, and nurses now specialize in fields like informatics, coding, and interventional radiology.
Nurse practitioners have gained recognition as primary care providers, reflecting a broader shift toward greater autonomy and leadership for nurses, alongside continued adoption of telehealth and interdisciplinary collaboration.